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A023336
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Numbers n such that n remains prime through 5 iterations of function f(x) = 3x + 4.
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34613, 165443, 321053, 363403, 474143, 496333, 528673, 631853, 834503, 957563, 1199623, 1274803, 1817093, 1918733, 2063423, 2611663, 2889703, 3224233, 3652703, 3697433, 3824413, 3852973, 4655873, 4708793, 5089943, 5508263, 5937853, 6067073
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| n, 3*n+4, 9*n+16, 27*n+52, 81*n+160 and 243*n+484 are primes. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 05 2010]
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PROG
| (MAGMA) [n: n in [1..25000000] | IsPrime(n) and IsPrime(3*n+4) and IsPrime(9*n+16) and IsPrime(27*n+52) and IsPrime(81*n+160) and IsPrime(243*n+484)] [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 05 2010]
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CROSSREFS
| Sequence in context: A164556 A068703 A081428 * A172579 A172570 A172672
Adjacent sequences: A023333 A023334 A023335 * A023337 A023338 A023339
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KEYWORD
| nonn
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AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
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